Bach 2½C vs Monette Cornet BP3F rim
The Bach 2½C has a wider cup diameter, the Monette Cornet BP3F rim features a deeper cup.
Mouthpiece A
Bach 2½C
• Cornet
Cup diameter16.40 mm
Cup depthMedium
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Monette Cornet BP3F rim
• Cornet
Cup diameter16.30 mm
Cup depthDeep
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Cup Diameter
The Bach 2½C has a cup diameter of 16.40 mm compared to 16.30 mm on the Monette Cornet BP3F rim — a difference of +0.10 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Monette Cornet BP3F rim has a deep cup while the Bach 2½C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm, so resistance feel will be comparable.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.